Method of dyeing



ARTHUR mnz, or new 'YORK, n. Y., AssIsnon To THE 'CHEMICAL FOUNDATION Y INCORPORATED. L

METHOD OF; DYEING.

' Specification of LettersPatent.

Patented Apr. 25,1922;

No Drawing. Original application-filed September 1,1921, Serial No'. 497,706. Divided. and this apoli cation filed December 15,

To all whom it may concern Be it known that I, ARTHUR LINZ, a citizen of the United States, and a resident of the borough ofManhattan, city, county, and State of New York, have invented an Improvement inMethodsvof Dyeing, of which the following vis a specification.

My invention relates to an improved method of-dyeing andqhas as an object the obtainment ofamorepiermanent and fast to light dyeings upon var ous materials, where- I treating as such dyeings heretofore have'been' ofa relatively fugitive and unstablecharacter.

In my copendingappli'cation,Serial No. 497,70.6,filed'Septemloer '1, 1921, there'is set fortha method of dyeing which-comprises ing the dyed material to an after treatment of phosphorous and a soluble compound of I v a di'liicultly fusible inetah out of which the invention described herein has been divided.

When various materials, such as for example, textiles, leather, hides, and so on, are, dyed by the ordinarymethod, the colors are not always permanent and are sometimes affected by the light. It is an object of my improved method to obviate these possible objections :and it is shown that when, textiles, leather, and so on, are treated in accordance with, my method, the colors obtained thereon are relatively faster and more permanent.

l he dyeings hereinbefore referred to 'de pend upon the formation of color lakes and the previous processes for producing these lakes upon various materials are not of such a character as to permit of their general adoption, forthe reason that these processes are expensive in consequence of the chemicals employed therein, which chemicals may be produced only through the expenditure of considerable time and labor.

The color lake formation u on textiles,

andso forth,'has been accomplis ed through the employment of complex acids contaming tungsten, such as for instance, phosphotungstic acid and silicotungstic acid or salts of these complex acids. 'The preparation "of the complex acids or the salts thereof with the attendant separation of the same from the by-p'roducts, is an involved,

the material to'be dyed in a solution containing dyestuff, and then subject difficult and I 1921. Serial No. 522,462.

expensive procedure, and accordingly their use has materially affected dyeings depend= ent upon the formation of the color lakes'j produced through the intermediation of such complex acids or their salts", I

I have discovered procedure for the dyeing'of textiles, leather, and so on, through the formation of fcolo'rv lakes produced through the use of compounds containing Further, 1n consequence thereof my proc-- ess presents a modewhereby color lakesmay' I be generally applied in dyeing the various materials andat a cost which will admit of their general use and application. p

The process according; to my invention" orus and silicon, which shall, during involve the production and comprises treating textiles, leather, and; so

I on, properly" mordanted with compounds containing phosphorus and silicon together with compounds eontaln ng'a difiicultly fILSl ble metal, of whlch compounds various ones may be used such as, for instance, the acids,

that is phosphoric or silicic or -their salts, I v and compounds of such metals as tungsten I or molybdenum, and subsequently subjecting the thustreated "materialswith 'a sole, tion containing manner in accordance therewith, it hasbe'e'n ascertained that such dyeings of textiles, leather "and so onare relatively permanent.

The followin example will serveas an illustrative embodiment of a manner in which my process may be carried into practical effect: i

Take 'a quantityv of textile, leather, hides,

skins or the like, (for'example one hundred j 1 pounds) properly mordanted with tanni'c.

h stulf in the usual? acid and an antimony salt, or tannin bearing- 7 extract and treat the same in a suitable 1mrnerslon receptacle with a solution in which has been dlssolved a phosphate'of sodium,

e. g., di-sodium phosphate, and sodium tungstate, ra phosphate of sodium and sodium molybdate together with an acid, such as for example, acetic acid to roduce in this solution either sodium p, osphotungstate,. or

phosphotungstio acid, or sodium phosphomolybdate, or phosphomolybdic acid. The

above salts may be added in an amount sufli-- cient to produce about five pounds of the complex salt or its equivalent.

After a sufficient incorporation of the salt solution, this solution is displaced by a dye solution containing, for example, about one half pound of methyl violet. This subsequent treatment may be carried out in the usual manner, either in a vat or a drum and may take place at ordinary temperature, although it may beconsidercd preferable to carry out the subsequent treatment at a raised temperature of say about 70 C.

When it is desired to employ salts of an acid of phosphorus or silicon, together with V salts of a difiicultly fusible metal, it may be found preferable to add to the dyeing bath a suitable organic or inorganic acid which acid shall be capable of freeing phosphoric, tungstic, molybdic and silicic acids from their respective salts, for which purpose there may preferably be used hydrochloric acid, sulphuric acid and acetic acid which will not affect the coloring matter being used, and it will be understood, of course, that such acid may be entirely dispensed with if the formation of the color lake takes place satisfactorily withoutqits use, and this may be readily determined by simple treatment. 7 r

The dyestuffs which may be preferably utilized in my process are usually designated as the basic coal tar dyes and in addition to methyl violet set forth in the above example, a

there may be employed such dyestuffs as auramine, phosphin, chrysoidin, Bismarck brown, malachite green, emerald green, methylene blue, Victoria blue, crystal violet, safiranine and basic fuchsin, but it will be understood that my process is not limited to the specific class or-the specific dyes herein mentioned, but may beemployed for such dyes as will give a permanent and fast color through fixation by means of the compounds set forth.

and so on, which comprises treating said ma,

terials with a solution which has beenpre pared from a soluble compound of phosphorus anda soluble compound of a drtfi' cultly fusible metal and an acid capable of I freeing the acid from such compound, and

then dyeingsaid material in the usual manand so on, which comprises treating said material with a solution which has been prepared from a soluble compound of phosphorus and a soluble compound of tungsten,

and then dyeing said material in the usual manner. 7

4-. The process of dyeing textiles, leather, and so on, which comprises treating said materials with a solution which has beenprepared from a phosphate of sodium and tung state of sodium, and then dyeing said material 1n the usual manner.

5. The process of dyeing textiles, leather,

and so on, which comprises treating said ma terials wlth a solution whlch has been pre- 3. The process of dyeing textiles, leather,

pared from di-sodium phosphate and sodium tungstate, and then dyeing s'aid material in the usual manner. v r

6. The process of dyeing textiles, leather, and so on, which comprises treating said materials with a solution which has been pre}. pared from a soluble compound of phosphorus' and a soluble compound of a diflicultly fusible metal and acetic acid, and then dyeing said material in the usual manner.

In testimony whereof, I have signed my name to this specification this 9th day of December, 1921.

ARTHUR LIN Z. 

